How to say in Czech: They speak Japanese very well.

English
speak very well.
Czech
Oni mluví japonsky velmi dobře.
They do not speak Japanese very well.
Do they speak Japanese?
They do not speak Japanese.
They speak Japanese.
They speak Japanese fluently.
They speak only a little Japanese.
Does anybody here speak Japanese?
Your Japanese is very good.
Your Japanese is getting better.
How good is your Japanese?

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